On Old Earth, the northern supercontinent formed after Pangea broke up during the Jurassic period. During the Cretaceous period Laurasia had a quite different dinosaurian and mammal fauna to that of Gondwana in the south. Laurasia itself broke up to become North America, Europe, Asia, Greenland, and Iceland.
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Text by M. Alan Kazlev
Initially published on 03 December 2001.